WhatsApp Outreach Automation API

what linkupapi allow you to do

Buying signals detection

Detect intent signals like funding rounds, hiring activity, and company growth. Reach prospects at the perfect moment with real-time alerts.

Multi B2B channel

Reach prospects across LinkedIn, WhatsApp, email, and web. Manage all B2B channels through one unified API platform.

Multi-source data

Aggregate information from dozens of public sources. Get the most complete profiles by combining data from multiple sources.

App integrations

Connect with your favorite tools through native integrations. Compatible with Make, n8n, Zapier, and any platform via REST API.

Compliance first

Never store credentials or post-login data. EU-hosted, GDPR and CCPA compliant, with a data processing agreement on request.

Scalability

Handle millions of requests without performance degradation. Our infrastructure scales automatically to match your growth and usage patterns.

// What it does

Send a message to a phone number from a connected WhatsApp number, attach a file or a voice note, and get every reply through a webhook. Same key, same body shape and same seat model as LinkedIn and email.

// Three workflows teams ship with it

Use case · Multi-channel sequence

The step after LinkedIn and email

No reply on LinkedIn, no answer by email: the sequence continues on WhatsApp with the same context, then stops on reply.

LinkedIn · day 0, Email · day 5, WhatsApp · day 9

WhatsApp message API

Use case · Inbound follow-up

Answer a lead where they already are

A form gives you a phone number: your product sends the first WhatsApp message within a minute and hands the thread to a human on reply.

Form received, Message sent · 40 s, Reply · rep notified

LinkedIn automation API

Use case · AI agent

An agent that picks the channel

Over MCP, the agent reads the conversation history and chooses LinkedIn, email or WhatsApp for the next message, within the limits you set.

History read, Channel chosen, Message sent

LinkupAPI MCP server

// Two calls, one sequence

1import requests
2
3# Send a WhatsApp message from a connected number (account_id = your WhatsApp seat)
4response = requests.post(
5    "https://api.linkupapi.com/v2/messages",
6    headers={"x-api-key": "YOUR_API_KEY"},
7    json={
8        "account_id": "YOUR_WHATSAPP_ACCOUNT_ID",
9        "action": "send",
10        "params": {
11            "to": "33612345678",
12            "message_text": "Hi Jane, following up on my email about your outbound stack. Worth 15 minutes next week?",
13            "media_link": "https://yourdomain.com/one-pager.pdf"
14        }
15    }
16)
17
18print(response.json())

Jane Doe

+33 6 12 34 56 78 · WhatsApp

Message delivered with attachment
Read 2 minutes later
Reply received · webhook delivered

// How it compares

// SECURITY & COMPLIANCE

Privacy and security with no compromise.

Your users trust you with their accounts. Here is how we keep them safe.

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Passwords never stored

We never keep your users' passwords. Sessions are encrypted, isolated per account and revocable at any time.

EU-hosted, GDPR & CCPA

Data is processed and hosted in the European Union. GDPR and CCPA compliant, with a data processing agreement on request.

Google-verified security

LinkupAPI passed Google's CASA security assessment and is a verified Gmail app. Same review, same standards for every channel.

New signal detected

+100 ready to use automated actions

Enterprise-grade security measures ensuring your data remains protected at every step of the process.

Frequently asked questions.

LinkupAPI V2 - See what’s new

LinkedIn, email and WhatsApp through one API. Unlimited accounts, one fixed price.

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50

+

Endpoints

99.9

%

Uptime

< 3

s

Avg Response